Definition: Feature surface classification
Asphalt
Primarily road surfaces, but may also include driveways, and walkways.
Athletic
Surfaces such as tennis and basketball courts.
Bridge - Asphalt
Specified where identifiable.
Bridge - Concrete
Specified where identifiable.
Bridge - Paved
Clearly an improved and reinforced surface, but of an unknown type. Only able to discern the surface is not wood.
Bridge - Uncertain
Only able to discern the structure is a bridge.
Bridge - Wood
Specified where identifiable.
Buildings
All buildings, without being able to discern any consideration for "Green Roofs."
Concrete
Primarily road surfaces, driveways, and walkways.
Gravel
Typically semi-improved road surfaces.
Helipad
Helipads can be constructed of different materials, making it difficult to determine the specific surface type.
Patio
Patios greater than 10 square feet captured, these are typically concrete, but not always discernable.
Paved
Compacted, stabilized, and improved surfaces used for transportation, including roadways, driveways, runways, taxiways, and walkways. The specific material type may be indeterminate.
Permanent Substation
The outer extent of each substation.
Pervious
Areas of grass, open disturbed soil, trees, shrubland, open water such as ponds, lakes, and rivers.
Pool Above Ground
Separate from the Pervious classification in that the pool water is captured for long periods and when drained, presents an impervious surface unto itself.
Pool In Ground
Separate from the Pervious classification in that the pool water is captured for long periods and when drained, presents an impervious surface unto itself.
Portable Substation
Typically transformers located on or as 18-wheeler trailers.
Smokestacks
Features captured to outer diameter or extent of the stack.
Storage Tank
Significant above ground tanks capable of holding solid, liquid, or gaseous contents.
Track
Pathways other than paved or otherwise improved community walkways. Examples would include compacted or paved trails in the woods, which may make surface type identification difficult.